/*
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 *    InstanceCounter.java
 *    Copyright (C) 1999 University of Waikato, Hamilton, New Zealand
 *
 */

package weka.gui.streams;

import weka.core.Instance;
import weka.core.Instances;

import java.awt.Color;

import javax.swing.JLabel;
import javax.swing.JPanel;

/**
 * A bean that counts instances streamed to it.
 * 
 * @author Len Trigg (trigg@cs.waikato.ac.nz)
 * @version $Revision: 7059 $
 */
public class InstanceCounter extends JPanel implements InstanceListener {

	/** for serialization */
	private static final long serialVersionUID = -6084967152645935934L;

	private JLabel m_Count_Lab;
	private int m_Count;
	private boolean m_Debug;

	public void input(Instance instance) throws Exception {

		if (m_Debug) {
			System.err.println(Messages.getInstance().getString(
					"InstanceCounter_Input_Error_Text_First")
					+ instance
					+ Messages.getInstance().getString(
							"InstanceCounter_Input_Error_Text_Second"));
		}
		m_Count++;
		m_Count_Lab.setText(""
				+ m_Count
				+ Messages.getInstance().getString(
						"InstanceCounter_Input_Count_Lab_SetText_Text_Second"));
		repaint();
	}

	public void inputFormat(Instances instanceInfo) {

		if (m_Debug) {
			System.err.println(Messages.getInstance().getString(
					"InstanceCounter_InputFormat_Error_Text_First"));
		}
		Instances inputInstances = new Instances(instanceInfo, 0);
		m_Count = 0;
		m_Count_Lab
				.setText(""
						+ m_Count
						+ Messages
								.getInstance()
								.getString(
										"InstanceCounter_InputFormat_Count_Lab_SetText_Text_Second"));
	}

	public void setDebug(boolean debug) {

		m_Debug = debug;
	}

	public boolean getDebug() {

		return m_Debug;
	}

	public InstanceCounter() {

		m_Count = 0;
		m_Count_Lab = new JLabel(Messages.getInstance().getString(
				"InstanceCounter_Count_Lab_JLabel_Text"));
		add(m_Count_Lab);
		// setSize(60,40);
		setBackground(Color.lightGray);
	}

	public void instanceProduced(InstanceEvent e) {

		Object source = e.getSource();
		if (source instanceof InstanceProducer) {
			try {
				InstanceProducer a = (InstanceProducer) source;
				switch (e.getID()) {
				case InstanceEvent.FORMAT_AVAILABLE:
					inputFormat(a.outputFormat());
					break;
				case InstanceEvent.INSTANCE_AVAILABLE:
					input(a.outputPeek());
					break;
				case InstanceEvent.BATCH_FINISHED:
					if (m_Debug)
						System.err
								.println(Messages
										.getInstance()
										.getString(
												"InstanceCounter_InstanceProduced_InstanceEventBATCH_FINISHED_Error_Text"));
					break;
				default:
					System.err
							.println(Messages
									.getInstance()
									.getString(
											"InstanceCounter_InstanceProduced_InstanceEventDEFAULT_Error_Text"));
					break;
				}
			} catch (Exception ex) {
				System.err.println(ex.getMessage());
			}
		} else {
			System.err.println(Messages.getInstance().getString(
					"InstanceCounter_InstanceProduced_Error_Text"));
		}
	}
}